ar71xx: Add kernel 4.9 support

This add support for kernel 4.9 to the ar71xx target.
It was compile tested with the generic, NAND and mikrotik subtarget.
Multiple members of the community tested it on their boards and did not
report any major problem so far.

Especially the NAND part received some changes to adapt to the new
kernel APIs. The serial driver hack used for the Arduino Yun was not
ported because the kernel changed there a lot.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

1 files changed, 34 insertions, 0 deletions

diff --git a/target/linux/ar71xx/patches-4.9/407-mtd-m25p80-allow-to-pass-probe-types-via-platform-data.patch b/target/linux/ar71xx/patches-4.9/407-mtd-m25p80-allow-to-pass-probe-types-via-platform-data.patch
new file mode 100644
index 0000000000..4fa957e70b
--- /dev/null
+++ b/target/linux/ar71xx/patches-4.9/407-mtd-m25p80-allow-to-pass-probe-types-via-platform-data.patch
@@ -0,0 +1,34 @@
+--- a/drivers/mtd/devices/m25p80.c
++++ b/drivers/mtd/devices/m25p80.c
+@@ -192,6 +192,7 @@ static ssize_t m25p80_read(struct spi_no
+  */
+ static int m25p_probe(struct spi_device *spi)
+ {
++	struct mtd_part_parser_data	ppdata = {0,};
+ 	struct flash_platform_data	*data;
+ 	struct m25p *flash;
+ 	struct spi_nor *nor;
+@@ -244,8 +245,11 @@ static int m25p_probe(struct spi_device
+ 	if (ret)
+ 		return ret;
+ 
+-	return mtd_device_register(&nor->mtd, data ? data->parts : NULL,
+-				   data ? data->nr_parts : 0);
++	return mtd_device_parse_register(&nor->mtd,
++			data ? data->part_probes : NULL,
++			&ppdata,
++			data ? data->parts : NULL,
++ 			data ? data->nr_parts : 0);
+ }
+ 
+ 
+--- a/include/linux/spi/flash.h
++++ b/include/linux/spi/flash.h
+@@ -24,6 +24,7 @@ struct flash_platform_data {
+ 	unsigned int	nr_parts;
+ 
+ 	char		*type;
++	const char	**part_probes;
+ 
+ 	/* we'll likely add more ... use JEDEC IDs, etc */
+ };